Abstract
The control of performance-oriented materials structure will be limited by the preparation of materials, and the research on the correlation between the preparation methods and the target structure will be an interesting direction. In this paper, three kinds of precursor mixture of Fe2O3 and g-C3N4 (FeCl3/DCDA-1, 2, 3) were prepared by mechanical compounding and simple hydrothermal method respectively. After calcination under the same conditions, Fe2O3/g-C3N4 composite catalysts were prepared. The relationship between the structure of the precursor obtained by different preparation methods and the performance of the composite catalyst was studied by thermal decomposition kinetics. The results show that in the simple hydrothermal method, compared with FeCl3/DCDA-3 obtained by drying only the composite crystals precipitated in the mixed solution, the activation energy of FeCl3/DCDA-2 obtained by drying the mixed solution increases with the increase of conversion rate, and has a higher pre exponential factor A value. This may be due to the increasingly strong interaction between Fe(OH)3 and dicyandiamide in FeCl3/DCDA-2, which makes dicyandiamide difficult to be converted into melamine in the calcination process. As a result, the interface interaction between Fe2O3 and g-C3N4 in the composite catalyst becomes stronger, forming a strong Fe–N coordination bond and promoting the separation of electron holes. Fe2O3/g–C3N4–2 has the highest photocatalytic activity among the prepared photocatalysts. It can degrade 62.0% of methylene blue (MB) under visible light irradiation for 60 min, which is 2.32 times that of pure g-C3N4 (34.6%). In addition, under the same conditions, Fe2O3/g–C3N4–2 can degrade 7.72% of ciprofloxacin (CIP).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.